Signalling devices for telephones



Nov. 26, 1963 w. L. GlBBs 3,112,366

SIGNALLING DEVICES FOR TELEPHONES Filed Sept. 4, 1959 3 Sheets-Sheet 1WILLIAM L. Gx \BBS ATTORNEY Nov. 26, 1963 Filed Sept. 4, 1959 W. L.GIBBS SIGNALLING DEVICES FOR TELEPHONES [o8 Ilo 5 Sheets-Sheet 2INVENTOR.

WILLMM L. CHESS Nov. 26, 1963 w. L. GlBBs SIGNALLING DEvIcEs FORTELEPHONES 3 Sheets-Sheet 3 Filed sept. 4, 1959 22o 111. zu

INVENTOR.

WLLlAM L.. @H565 ATTORNEY United States Patent O M 3,1l256 SHGNALLHNGDEVllCEt-l FOR TELEPHNES William L. Gibbs, 6212 Nottingham, St. Louis,Mo. Filed Sept. 4, 1959, Ser. No. 838,239 19 Claims. (Cl. 179-64) Thisinvention relates to improvements in signalling devices for telephones.More particularly, this invention relates to improvements in signallingdevices for coin operated telephones.

t is therefore an object of the present invention to provide an improvedsignalling device for coin operated telephones.

Coin operated telephones are customarily provided with coin receptacleboxes; and those boxes are removable so they can be taken to adesignated oice of the telephone company where their contents can beremoved, counted and accredited. Collectors employed by the telephonecompany make periodic visists to the various coin operated telephones ofthe company to remove the coin receptacle boxes and to replace thoseboxes with empty coin receptacle boxes. The visits which the collectorsmake to the various coin operated telephones of the company should befrequent enough to keep the coin receptacle boxes from becoming so fullthat they prevent the entry, into those boxes, of additionally insertedcoins; because the prevention of such entry can cause additionallyinserted coins to lill up the coin hopper and coin chute of the elephoneand can cause grounding of the coin-collecting of coin-refunding relay.On the other hand, the visits which the collectors make to the variouscoin operated telephones of the company should not be so frequent thatonly limited numbers of coins are found in the various coin receptacleboxes.

Heretofore it has been the practice of telephone companies to establishschedules which the collectors follow in visiting the various coinoperated telephones of the company; and those schedules have beenplanned so the collectors would remove the various coin receptacle boxesat times when they were substantially filled but when they were notfilled to overflowing. Unfortunately, the rate of use of coin operatedtelephones in different locations can vary widely, and furthermore therate of use of a coin operated telephone in any given location can alsovary widely. While it might seem possible to predict, with a good dealof accuracy, the extent and degree to which a coin operated telephone inany specific location would be used, it is actually impractical to doso. Not only are there unpredictable variations in the use of such acoin operated telephone for the purpose of making local calls, but thereare unpredictable variations in the use of such coin operated telephonefor the purpose of making long distance calls. As a result, even withthe best statistical methods, it is impossible to establish schedulesthat will assure removal of the coin receptacle boxes before they arecompletely lled but that will avoid removal of such boxes when theycontain only a few coins.

The need of avoiding the overflowing of the coin receptacle box of acoin operated telephone is acute, because overflowing can causegrounding of the coin-collecting or coin-refunding relay of thattelephone. Any such grounding will render the coin operated telephonetemporarily inoperable, and it can render a number of coin operatedtelephones in the same control bank temporarily inoperable. Moreover,any such grounding will require a service call plus an unscheduled visitby a collector; the service call being necessary to ascertain the sourceof the grounding, and the unscheduled visit by the collector heingnecessary because the service nien are usually not authorized to removeand replace the coin receptacle boxes. The costs of service calls ofthis sort, and the Patented Nov. 26, i963 ICC costs of the ensuingunscheduled visits by the collectors, could be avoided if a device couldbe supplied which would indicate to the central oice of the telephonecompany when the coins in the coin receptacle box of a coin operatedtelephone reached a predetermined level. Such a device would avoidneedless visits by a collector, because the collector would not visitthat coin operated telephone until after the device indicated that thecoins in the box of that telephone had reached the predetermined level;and such a device would avoid needless service calls by service menbecause the device would provide an indication at the central oiice ofthe telephone company that would enable a collector to remove the coinreceptacle box before it became filled to overflowing. The presentinvention provides such a device; and it is therefore an object of thepresent invention to provide a de- Vice that can be used with a coinoperated telephone to indicate, at the central office of a telephonecompany, when the coins in the coin receptacle box of that telephonereach a predetermined level.

The problem posed by the overflowing of coins in coin operatedtelephones is serious, because from about twenty-ive to thirty percentof the service calls made by a telephone company in one large city havebeen found to be due to such overflowing. Such service calls areactually needless, and they needlessly increase the operating costs ofthe service department of the company. All such needless costs areobviated by the use of the device provided by the present invention.

The device provided by the present invention includes an electricalconductor which is mounted within the coin receptacle box of the coinoperated telephone; and that conductor will be contacted by one or moreof the coins in the coin receptacle box when the coins in that box riseto a predetermined level. That conductor will be connected to thecentral otlice of the telephone company; and the engagement of the coinswith that conductor will change the electrical status of the coinoperated telephone. That change in electrical status can be detected atthe central oflice by the making of the standard and usual lineinsulation test-a test that is usually made, on a periodic basis, bymost telephone companies to determine the presence of impendingbreakdowns in line insulation. That test is made manually orautomatically, as the equipment in the central office of the telephonecompany dictates; and it is only necessary to make the line insulationtests on the various coin operated telephones once each day to determinewhich of the coin operated telephones have coin receptacle boxes whichrequire replacement. ln this simple and easy way, the present inventionprovides positive and prompt information as to the location of any coinoperated telephone which has a coin receptacle box needing emptying. Itis therefore an object of the present invention to mount a conductor,within the coin receptacle box of a coin operated telephone, which canbe contacted by the coins within that coin receptacle box, afterpredetermined quantities of coins have been introduced into thatcoin-receptacle box, to change the electrical status of that coinoperated telephone.

The conductor is mounted in the coin receptacle box in such a way that asubstantial quantity of coins must be introduced into the box beforethat conductor can be contacted by the coins. In one preferredembodiment of the present invention, the conductor is mounted so thecoins will not contact it until approximately eighty percent of theusable space within the coin receptacle box has been filled with coins.As a result, the coin receptacle box will have a substantial quantity ofcoins in it when the collector removes it and replaces it with an emptycoin receptacle box.

The conductor is disposed within the coin receptacle box so it is spacedinwardly `from the sides of that box. Such an arrangement is desirablebecause a conductor that would be set immediately adjacent one side ofthe coin receptacle box could have coins pile up adjacent it andindicate that the box was ready to be replaced although that box`actually did not require replacement. By mounting the conductor so itis spaced inwardly from the sides of the coin receptacle box, thepresent invention avoids premature indications of the need of replacingthe coin receptacle box. It is therefore an object of the presentinvention to mount a conductor within a coin receptacle box so it isspaced inwardly from the sides of that box.

The conductor is spaced inwardly `from the walls of the coin receptaclebox by la support, and that support protects the insulated portion ofthe conductor from abrasion land wear by coins entering that box. Thatsupport also serves `to deflect coins away from the horizontal center ofthat coin receptacle box. The coins that enter the coin receptacle boxof a coin operated tel= phone are introduced into that box by a chute,and they tend to pile up directly under that chute. As a result, thosecoins tend to assume a pyramidal configuration, and the top of theresulting pyramid can approach the top of the coin receptacle box eventhough the level of the coins adjacent the sides of the box is quitelow. This tendency of the coins to yfor-rn a pyramid is objectionable,and the present invention obviates this tendency because the support forthe conductor serves to deect the entering coins toward the sides of thecoin receptacle box. As a result, the coins introduced into the coinreceptacle box will ll all of the lower areas of the coin receptaclebox. It is therefore ian object of the present invention to provide asupport which serves to deilect the entering coins toward the sides ofthe coin receptacle box.

The coin receptacle box must have an opening in one wall thereof toenable that :wall to telescope over the conductor and its support.However, that opening can not be as large as a dime; because, if it vere, dimes could pass outwardly through that opening after the coinreceptacle box was removed from the telephone. The present inventionprovides a conductor and a support therefor which are so small that thecomplementary opening in the coin receptacle box can be small enough toprevent the passage of a dime through it. it is therefore an object ofthe present invention to provide a device which is small enough so anopening, smaller than a dirne, can be provided in one wall of a coinreceptacle box to accommodate and telescope over that device.

Other and further objects and advantages of the present invention shouldbecome apparent from an examination of the drawing and accompanyingdescription.

In the drawing and accompanying descriptions some preferred embodimentsof the present invention are shown and described but it is to beunderstood that the drawing vand accompanying description are for thepurpose of illustration only 'and do not limit the invention and thatthe invention will be dened by the appended claims.

ln the drawing, FIG. 1 is a vertical section through part of a coinoperated telephone that has been equipped with one embodiment of thedevice provided by the present invention,

FIG. 2 is `a sectional view, on a larger scale, through the combinedsupport and deflector shown in the telephone of FIG. 1, and it is takendong the plane indicated by the line 2 2 in FIG. l,

EG. 3 is a partially broken, plan view, on the scale of FiG. 2, of somecomponents of the coin operated telephone shown in FIG. l,

FiG. 4 is a sectional view, on the scale of FIG. 2, through the combinedsupport and detlector shown in the telephone of `Fi l, and it is takenalong the plane indicated by the line 4 4 in FIG. l,

FIG. 5 is 4a sectional view, along the plane indicated by line 5-5 inFlG. 3, through the combined support and deflector of FIG. 3,

FIG. 6 is a vertical section through part of another telephone,

FiG. 7 is a vertical section through part of still another teiephone,

FIG. 8 is a vertical section, on a larger scale, of the backbase andprojecting conductors of FIG. 7,

FIG. 9 is a rear view, on the scale of FIG. 8, of part of the backbaseof the telephone of FIG. 7,

FIG. l0 is a vertical section, on a larger scale, of the rear wail ofthe coin receptacle box of FIG. 7,

FIG. 1l is a vertical section of another coin receptacle box,

FIG. 12 is a vertical section through the backbase of the telephonelwith which the coin receptacle box of FIG. 1l is used,

FIG. 13 is a sectional view, on a larger scale, along the pianeindicated by the line 13-13 in FIG. l1,

FIG. 14 is an enlarged rear elevational view of a metal cone used in thetelephone of FIG. ll,

FIG. 15 is a front elevational view, on Ia larger scale, of a retainerused in the telephone of FIG. ll, and

FIG. 16 is a rear elevational view of an insulating washer used in thetelephone of FIG. 1l.

Referring to the drawing in detail, the numeral 10 denotes the metalbackbase or backboard of a coin op erated telephone of standard andusual design `and construction. That backbase has a housing 12 securedto it by screws, not shown, and that housing has an opening at the frontthereof. A removable closure 14 is provided for the opening at the frontof housing 12, and that closure is provided with a suitable lock, notshown, that prevents access to that housing by unauthorized persons. Thehousing `12 has a large opening 17 in the top thereof, and that openingaccommodates a mechanism base 15. An opening 16 is provided in themechianism base 15, and that opening is in register with the outlet endof a chute through which coins introduced into the coin operatedtelephone pass. That chute acts to direct those coins toward an openingin the top of the coin receptacle box disposed within the housing 12. Asecond opening 1E provided in the mechanism base 15, and that opening islocated adjacent one side of the opening 16, as shown particularly byFIG. 3.

The numeral 20 denotes a terminal lug that is mounted on, but isinsulated from the backbase 10; and that terminal is customarily knownin the telephony art as terminal lug Y. That terminal lug is on the ringor battery side of the line which is connected to the central office ofthe telephone company. The numeral 22 denotes a screw that iscustomarily provided in coin operated telephones; and that screw is oneof the screws that customarily secures the mechanism base 1S to thehousing 12. The numeral 24 denotes la binding screw which is mounted onthe coin-collecting or coin-refunding relay, not shown, supported by themechanism base 15 of the coin operated telephone.

in many coin operated telephones the backbases are not especiallydesigned to be grounded; and FIG. l shows, in part, such a coin operatedtelephone. However, certain of the functional components of coinoperated telephones are grounded; and the numeral 26 denotes the groundwire of the telephone circuit, and that wire extends to the bindingscrew 24. Further, as pointed out hereinafter in detail, the backbase ofthe coin operated telephone of FIG. 1 will be grounded when thesignalling device of the present invention is incorporated within thattelephone.

The numeral 23 generally denotes the coin receptacle box used `with thecoin operated telephone that is shown, in part, by FIG. l. That coinreceptacle box is dimensiened to lit within the housing 12; and itsbottom rests upon spaced bosses 13 that are provided on the floor of theinterior of the housing l2. The coin receptacle box ZS is of standardand usual design, :and it is provided with a cover 'Siti of standard andusual design. rllhat cover has an opening 32 therein, land that openingwill be alined fwith the opening le in the mechanism base whenever thecoin receptacle box ZS is fully seated within that housing. A seal 34 isprovided lfor the coin receptacle box 25, and that seal preventsaccidental opening of the cover or that coin receptacle box. The coinreceptacle box 2S is also provided with a closure, not shown, -for theopening E in the cover thereof, and with a locking arrangement tor `thatclosure. A housing Sti is pro-vided at the under face of the cover 3),and that housing largely encloses a rotatable member 9S of the lockingarrangement for the closure for opening 32. That closure and the rest ofthat locking arrangement have not been shown because they are ofstandard and usual design and are not a part of the present invention.In fact all of the various elements, of the `coin operated telephone,that have been discussed hereinbefore in this detailed description ofthe drawing, are of standard and usual construction and are not part orthe present invention.

The numeral 36 generally denotes a combined support and deilector thatis provided by the present invention. That combined support 4and deectorhas `a coin-deflecting surace 38, and that surface is generallyrectangular in plan. An ear 42 is provided at one end of thatcoinideecting surface, and that ear projects vertically upwardly fromthat surface. One of the long sides of the coin-deecting surface 3S isbent downwardly and then inwardly and upwardly to form a tubular recessd4. The forward edge of the opposite side of the coin-deecting surfaceis cut away at 46 to provide a tapered leading edge for the combinedsupport and deflector 36.

A tubular recess 44 accommodates an insulated lconductor 48, and one endof that insulated conductor projects outwardly beyond the leading edgeof the colindeecting surface 3S. That outwardly projecting end isdenoted by the numeral Sil; and that end is freed of inulation and isprovided with a thin coating of solder or other corrosion-resistantmaterial. The bared end S@ of the insulated conductor 48 is spaced ashort distance beyond the tapered leading edge of the coin-deilectingsurface 3S, as shown particularly by FIGS. l and 3. As a result, theinsulated conductor 43 and the combined support and ideflector 36 arenormally electrically isolated from each other.

The other end of the insulated conductor 48 extends rearwardly from therecess 44 of the combined support and deilector 36 and then extendsthrough the opening lh in the mechanism base 1S. That other end also isfree of insulation, and it is connected to one of the leads yot" aresistor 52 by a splicing sleeve 5d. That resistor can be one of theinexpensive carbon resistors used in radio and television work; and thatresistor will preferably have a resistance of one hundred thousand ohms.The other lead of the resistor '52 is suitably secured to the terminallug Ztl.

Self-tapping screws 62 extend through openings, not shown, in the ear42, of the combined support and deiiector 36 to seat in openings in thebackbase lil of the coin operated telephone. Those screws perform the`dual function oi' mechanically securing the combined deilectolr andsupport 36 to the backbase l0 and of electrically connecting thatcombined support and deilector to that backbase. The portion of theconductor 4S which extends upwardly from the rearwardly directed end ofthe tubular recess 44 is shown in FIG. l as being disposed forwardly ofthe screws 62 `and of the ear 42. This was done `to keep that conductorfrom obscuring the showing of the ear 42 and of the screws 62; butactually, that portion or" that conductor closely abuts the backbaselil. rllhe true position of that portion of that conductor is indicatedby the larger scale plan view 'of FIG. 3.

d The conductor d3 will be stili, and it will be bent to closely abutthe front face of the backbase 10 land to closely abut the under face ofthe mechanism base 15. As a result, the insulation on that conductorwill not be fabraded or wenn by the coin receptacle boxes as they yareinserted into, and withdrawn from, the housing 12.

ln mounting the combined support and ldeilector 36, and in mounting `theinsulated conductor 4S associated with that combined support anddeector, the closure ld and the coin receptacle box 28 are removed, andtwo small holes are drilled in the backbase 10. This is easily done byplacing a steel template against the backbase l@ and using that templateto demark the location of the two small holes. After those holes havebeen drilled, one end of the insulated conductor 43 is passed upwardlythrough the opening i3 in the mechanism base; and thereupon that end ofthat conductor and one of the leads .of the resistor 52 will beelectrical-ly interconnected by crimping 'a splicing sleeve S4 ontothem. The other end of the insulated conductor 4S is then telescopedforwardly through the tubular recess 44 of the combined support anddeilector 36 until that other end projects a short distance bey-ond theforward end of the coi-n-deflecting surface 3S. The insulated conductor48 telescopes through the tubular recess 44 quite readily, but it titsthat recess snugly enough to prevent accidental separation of thatconductor from that recess. l

Once the conductor 4S has been assembled with the recess ill of thecombined dee'ctor and support 36j, the two openings in the ear ft2 canbe set in register with the two drilled openings in the backbase l0.Thereafter the two self-tapping screws 62 will be passed through theopenings in the ear 4Z [and will be seated in the two drilled openingsin the backbase 10. Those self-tapping screws will not only mechanicallysecure the combined support and deiiector 36 to the backbase 10, butthey will also elect ically connect that support and deflector to thatbackbase. The upper lead of the resistor 52 will then be bent into theform of a hook and secured to the terminal Ztl. The conductor 43 willthen be bent until it closely abuts the iront face of backbase .lll andclosely abuts the under face of the mechanism base 15.

The numeral 56 denotes an opening which is provided yin the rear wall ofthe coin receptacle box 28. That opening lis circular in pant, and it isrectangular in part, as shown particularly by FIG. 4. That opening isgiven that configuration because such a coniguration is complementary tothe cross section of the combined support and deilector 36. lf thecombined support and deilector 36 were to be given a different crosssection, the opening 56 would, of course, be given a conguration whichwas complementary to that different cross section. The opening Se is solocated in the rear wall of the coin receptacle box 2S that it will besquarely in register with the combined support and `deilector 35whenever the bottom of the coin receptacle box 2S is resting upon thebosses '13 lat the bottom of the interior of the housing 12. The taperedleading edge of the coin-deecting surface 3 of the combined support anddeector Se will enable that combined support and deector to guide thecoin receptacle box 28 as it is moved into position within the housingl2.

The opening y56 is made small enough to keep a dirne from passingthrough; and, consequently, none of the coins in the coin receptacle box28 can become lost by passing through that opening. The opening 56 -isalso made small enough to make it diicult for a screw driver, a stiffwire, or any other object to be passed through that opening and used to.turn the rotatable member 98 or" the locking arrange ent for theclosure for the opening 32,. While that rotatable member has a slot toreceive the blade of a turning key, a screw idriver or the like, andwhile that rotatable member is readily turned when the cover 30 isremoved to provide full access to that rotatable member, it would bevexceedingly diicult atlaaee L: to insert a screw driver, a stiff wire,or any other object through the opening 56 and :turn the rotatablemember 93. To make any such insertion and turning even more difficult, aprotective barrier 10G is soldered, riveted or otherwise secured to thehousing 96. That barrier is closed on three sides and `on the bottom topositively precude any turning of the rotatable member 9S by an objectinserted through the opening The numenal 58 denotes a wire which will beheld by the screws 22 and 24 and which will electrically interconnectthose screws. Since the screw 24 receives and holds one end of thegrounding conductor 26, the wire 5S is able to lact as a ground for thescrew 22. That screw is seated in the housing 12, and, consequently, thewire 58 acts to ground the backbase and the housing 12. This isimportant where the coin operated telephone is of the type that has anungrounded backbase, because that backbase must be grounded to enablethe combined support and decctor 36 to be grounded.

In the operation of the coin operated telephone that is shown, in part,in FIG. l, coins will pass downwardly through the opening 16 in themechanism base 15 and enter the opening 32 in the coin receptacle box28. rFhose coins will strike the coin-detlecting surface 38 and reboundtoward the sides of the coin receptacle box 28; and as a result thecoins will pile up rather evenly in that coin receptacle box.Eventually, the level of the coins in the coin receptacle box will riseto the level at which one or more coins 60 will complete a circuitbetween the bare end 50 of the conductor `48 and the grounded combinedsupport and deector 36; and that circuit will interconnect the terminallug 2G and the grounded conductor 26. Where this happens, the resistanceof the resistor :32 will be interposed between `the terminal lug and thegrounded `conductor 26; :and that resistance is readily detectable atthe central ohce of the telephone company by means of the standard andusual line insulation test. The resistor 52 has an ohmic value that ishigh enough to avoid direct grounding of terminal lug 20, and hence thecoin operated telephone is perfectly usable; but that ohmic value is lowenough to provide an indication that is readily detectable iat thecentral oice of the telephone company.

Referring to FIG. 6, the numeral 64 denotes the backbase of another coinoperated telephone and that backbase has an opening 66 through it. 'Inaddition, that backbase has two smaller openings 67 through it. rl`heopenings `67 generally cor-respond to the openings, not shown, in thebackbase 1t) which accommodate the fasteners I62. However, instead ofreceiving self-tapping screws 62, as do the openings in the backbase1t), the openings 67 receive the bolts of bolt and nut combination 68.Those bolts extend through openings in the ear 42 of a combined supportand deflector 36, and they xedly secure that combined support anddeilector to the backbase 64.

The opening 66 in the backbase 61E is in register with the tubularrecess -in the combined support and deector 36, and that openingaccommodates the rearwardly extending portion of the conductor that isheld within that tubular recess. That rearwardly extending portion isbent upwardly and extends along the rear face of the backbase 64. Theleading edge of that conducto-r projects forwardly from the combinedsupport and deflector, and that leading edge is stripped of insulationand is coated with tin or some other corrosion-resistant material. Theconductor 49 is similar to the conductor 4S; but instead of being bentupwardly to extend along the front face of the backbase, the conductorf3 extends through the opening 66 and then is bent upwardly to extendalong the rear face of the baclibase.

FIG. 6 diters principally from FIG. l in the manner of mounting thecombined support and deticctor 36 and in the location of the conductor49. Where there is sufficient room between the rear of the coinreceptacle box 23 and the front face of the backbase to accommodate theconductor 48, the arrangement shown in FIG. 1 will be used. However,where there is not sumcient room to accommodate the conductor 48, theopening 66 will be drilled in the baclrbase 6ft and the conductor 49will be passed through that opening and then extended upwardly to anopening, not shown, in the backbase 64 that accommodates the yvariousconductors of the telephone line.

Referring to FIGS. 7-10, the numeral 70 denotes yet another backbase ofa coin operated telephone; and a housing '72 is suitably secured to thatbackbase by fastoners, not shown. 'Ihe housing 72 has an opening at thefront thereof; and a removable closure 76 is provided for that opening.That closure is provided with a suitable lock, not shown, that precludesaccess to that housing by unauthorized persons. The housing 72 has alarge opening in the top thereof, and that opening accommodates amechanism base 7S. That mechanism base has an opening 8d through it, andthat opening is located adjacent the bottom of the coin chute of thecoin operated telephone. The opening 80 of the mechanism base '7S -fisidentical to the opening 16 in the mechanism bm: i5. The mechanism base78 has an opening identical to the opening 18 -in the mechanism base`15, but that opening does not perform any particular function in thecoin operated telephone of IFIGS. 7-l0.

A screw S2 helps secure the mechanism base 78 to the housing 72. Abinding screw S4 is provided on the coincollecting or coin-refundingrelay, not shown, that is supported by the mechanism base 78. Agrounding conductor 86 is connected to the binding screw 84, and thatconductor extends to the grounding terminal, not shown, of the coinoperated telephone.

The numeral 83 denotes a coin receptacle box that can be disposed withinthe housing 72; and that coin receptacle box will rest upon and besupported by bosses 74 on the upper face of the bottom of the housing72. That coin receptacle box has a cover 9) and that cover is normallyheld closed by ya seal `92. An opening 94 is provided in the cover 9G,and that opening is below and in register with the opening 80 in themechanism base 7S. The cover is provided with a closure, not shown, forthe opening 94, and it is provided with a suitable loclting arrangementfor that closure. A housing 96, for part of that locking arrangement, isshown in FIG. 7, and that housing supports a rotatable member 98. Thatrotatable member is provided with la slot into which a suitableresetting tool can be inserted to re-set the locking arrangement.

The numeral denotes a barrier which is secured to the housing 96, landthat barrier underlies and protects the rotatable member 98. Thatbarrier is close on three sides and on the bottom, and it obviates astraight line path between the rotatable member 98 and the openings 104and 106 in the 4rear wall of the coin receptacle box SS. The barrier101B is identical to the barrier ti in FIG. l.

A grounding wire 162 extends between the screw 32 and the binding screw84. That conductor is comparable to the ground conductor 58 in FIG. l;and it connects the housing 72, and thus the backbase 7), to thegrounding conductor 86.

The numeral 188 denotes a flanged sleeve of some sturdy material such asmetal. The flange on that sleeve has openings which are atlined withcorresponding openings which are alined with corresponding openings inthc rear wall of the coin receptacle box 38; and the alined openingsaccommodate fasteners i116, such as rivets or the li.e. Those fastenersfixedly hold the sleeve 103 adjacent, and in register with, the opening104 in the rear Wall of the coin receptacle box 83. An insulating liningis pressed within the tlanged sleeve 168, and that lining projectsforwardly beyond the leading edge of the sleeve lil@ and projectsrearwardly beyond the rear face of the rear wall of the coin receptaclebox 33.

The numeral 114 denotes a iianged sleeve of a study material such asmetal. The flange of that sleeve has openings which are in registerlwith corresponding openings inthe rear wall of the coin receptacle box83. Those alined openings accommodate fasteners ldd, such as rivets orthe like; and those fasteners iixedly hold the sleeve 1214 adj-acent,and in register with, the opening diie in the rear wall of the coinreceptacle box The numeral @|13 denotes an opening in the baclibase 79.The numeral 12! denotes a second opening in that backbase, and theopening 126i is disposed below, but in vertical registry with, theopening H3. A hanged sleeve 122 of insulation is telescoped into theopening M8 from the front face of the backbase 7h, and `a generallysimilar flanged sleeve i241' of insulation is telescoped into thatopening from the rear face of that baclrbase. The confronting inner endsof the sleves 22 and 12d will preferably be spaced a short distanceapart so the flanges of the flanged sleeves 22 and |124 can bear solidlyagainst the front and rear faces, respectively, of the backbase 70.

The numeral l-Z denotes a cylindrical pin which has a conical leadingedge and which has threads at its trailing edge. That cylindrical pinmust be made of a material that iis electrically conductive, and it ispreferably made from a material such as brass, Phosphor bronze or thelike. A washer 12th is pressed onto the pin :126, and the engagementbetween that 'washer and that pin is so intimate that the washer isxedly and permanently secured in position on that pin. An opening V3.32is provided in the rear portion of the pin 126.

The diameter of the pin 126 `is slightly smaller than the innerdiameters of the flanged sleeves 122 and `124, but the outer diameter ofthe washer 128 is larger than the inner diameter of the hanged sleeve122. As a result, when the trailing edge of .the pin 126 is passedthrough the flanged slee-ves 122 and 12d, the washer i123 will abut andbe held by `the ilanged sleeve l-ZZ. At such time, a n-ut 130 can bethreaded onto the threaded trailing edge of the pin 126 and can betightened against the sleeve 12A. lIn this way, the pin `125 is heldfixed relative to the backbase 7G Iwhile being insulated from thatbiackbase.

The numeral e134 denotes a conductor that has had its lower end strippedof insulation and then passed througr the opening l32 in the rear or thepin 126. That lower end can be soldered or bnazed to the pin i126 toassure a good electrical connection between that phi and that conductor.The conductor 134 inclines dovmwardly as shown by FIG. 9, to passthrough a gap between two sections of an interrupted rib 138 whichproiects rearwardly from the rear face of the back-base 7d. Thatconductor is then bent to extend upwardly through a channel defined bythe interrupted rib i135 and by a continuous rib 135 which projectsrearwardly from the rear face of the backbase 7th The conductor 134extends upwardly to, and passes forwardly through, an opening dd@ in thebackbase 7h, `and then it inclines downwardly toward the Y terminal i146of the co'm operated telephone. A resistor :M2 is connected to thedownwardly inclined upper end of the conductor 134 by a splicing sleeve144. The resistor 142, the splicing sleeve ldd and the Y-terrninal 146are identical to the splicing sleeve 54, the resistor SZ and theY-ternrinal 2t) of FlG. l. The conductor 13d, the splicing sleeve 144,the resistor 142 and the Y-terminal lille connect the conductor 126 tothe ring or battery side of the telephone line.

The numeral 143 denotes a cylindrical pin which has a conical leadingedge and which has a threaded trailing edge. That pin has a washer l5@pressed onto it, and the engagement between that washer and that pin isso intimate that the washer is permanently fixed on that pin. Thediameter of the pin ldd is small enough so the rear thereof can bepassed through the opening liti in the baclibase 70. A nut 21.42 isthreaded onto the threaded trailing edge of the pin ldd, and that nutxedly secures that pin to the backbase 79. The pin ldd is of metal, andit will be held in electrically conducting engagement with the backbase7i?. Since the backbase 70 is grounded, by means of the housing 72 andthe conductor 102, the pin T148 also is grounded.

The sleeves ld and lidon the rear wall of the coin receptacle box titiare mounted and dimensioned so they are in register with, and cantelescope over, the conductors lZ and ldd. rThe sleeve 11d may or maynot come into electrical engagement with the conductor 148, but thesleeve lil?) will be unable to come into electrical engagement with theconductor l26 because of the lining ll?. of insulation. The conicalleading edges of the conductors 126 and MS will help guide the sleeves1&8 and lid as they telescope over the conductors 126 and 1.48. T hesleeve llisl and its lining lll?. will constitute a cornbined supportand deflector that performs the functions of the combined support anddeflector 36.

As coins enter the coin receptacle box S3 through the opening 9d, thosecoins will strike the sleeve 19S and be dehected toward the sides ofthat coin receptacle box. As further coins enter through the opening 94,the level of the coins in the coin receptacle box will eventually riseto the point where one or more coins will continuously lie in engagementwith the conductor ldd. At such time, the coins within the coinreceptacle box S3 will be grounded. As still further coins enter thecoin receptacle box 89o, the level of the coins will eventually riseuntil one or more coins continuously lies in engagement with theconductor lid. At such time, the piled up coins within the coinreceptacle box $3 will complete a circuit which extends from thegrounding conductor 86, past the binding screw Sd, through the groundingconductor M2, past the screw 82, through the housing 72, through thebackbase 7i), through the conductor 14S, through the piled up coins,through the conductor M6, through the conductor i3d, then through thesplicing sleeve ldd, and then through the resistor id21 to theY-terminal 146. rthat circuit will place the resistor 142 between thebattery side and the grounded side of the telephone line; and thepresence of that resistor can be detected at the central oiiice of thecompany by making the usual line insulation test.

The principal advantage of the construction of FiGS. 7-10 over theconstruction of FIG. 6 is that the sleeves litt and lid render itvirtually impossible for anyone to pass an implement into the coinreceptacle box 88 and rotate the rotatable member 93. While there islittle or no likelihood that a person could pass an instrument throughthe opening 56 in the rear of the coin receptacle box 2S and rotate therotatable member 9d, because the barrier lil@ encloses the bottom andthree sides of that member, the sleeves lo@ and lid make it highlyimprobable that an instrument could be passed through the rear wall ofthe coin receptacle box and used to rotate the member 9S.

Referring to FlG. 12, the numeral 16h denotes the backbase of stillanother coin operated telephone; and that backbase has openings 162 and16d through it. The opening lodis below, but in vertical alinement with,the opening 62. Shouldered sleeve ldd of insulation is telescoped intothe opening 162 from the front of the backbase 7i), and a similarshouldered sleeve i163 of insulation is telescoped into that openingfrom the rear of that bachbase.

A cylindrical pin 179, which has a conical leading edge and which has athreaded trailing edge, is equipped with a washer 172. That washer isxed solidly in position on the pin 17d, and it will abut the front ofthe threaded sleeve lod when the rear of the pin 17h is telescopedthrough the hanged sleeves lido and 15S. A nut is threaded onto thethreaded trailing edge of the pin 17d to ixedly secure that pin to thebackbase 16d. The flanged sleeves M6 and 16h help support the pin 3.7i)but electrically insulate it from the backbase i60.

A conductor ll has one end thereof bared, and that bared end extendsthrough an opening i7@- in the rear of the pin 170; and that bared endis suitably secured within that opening by solder, brazing or the like.That conductor is bent downwardly to pass through the gap in theinterrupted rib 228 which projects rearwardly from the rear face of thebackbase 16d. That conductor then passes upwardly through the channeldefined by that interrupted ri'o and an adjacent uninterrupted rib andpasses through an opening, not shown, comparable to the opening 146shown in PEG. 9. The other end of that conductor will be suitableconnected to the 1f-terminal, not shown, of the coin operated telephoneby a splicing sleeve and by a resistor, not shown.

The numeral 18d denotes a cylindrical pin which has a conical leadingedge and a threaded trailing edge. A washer 182 is pressed on, and islixedly secured to, the pin ist). The rear portion of the pin T186 istelescopcd through the opening 16d in the baclrbase idd, and a nut 134is threaded onto the threaded trailing edge of that pin to lixedly holdthat pin in assembled relation with the baci/ibase E69. The pins lil andlil@ are generally comparable to the pins l26 and M3 of FlGS. 7 and 8,but they are smaller in diameter and they are shorter in length.

The numeral ld denotes the coin receptacle box which is used with thehousing, not shown, that is secured to the baclrbase 16d. An opening Sis provided in the cover of that coin rece jtacle box, and that openingpermits coins to enter that box. A standard and usual closure andlocking arrangement, not shown, will be provided for the opening SS. Anopening is provided in the rear wall of the coin receptacle box ido, anda second opening 192 is also provided in that rear wall. The opening 92is disposed below the level of the opening 1199.

A llanged sleeve 194 is provided with a truste-conical leading edge andwith a llange at its trailing edge. An arcuate plate 196 of metal isembedded within the flange sleeve 194, and it constitutes the uppersurface of that flanged sleeve. That imbedded metal plate 196 has prongs193 which serve to anchor that metal plate within the sleeve 194.Preferably the sleeve 124 will be molded from a hard plastic materialsuch as nylon or the like; and the metal plate ld will constitute arebounding surface that will be struck by coins entering the coinreceptacle box 36 through the opening E83.

The sleeve 94 has a short cylindrical recess 25d in the rear thereof andthat recess is contiguous with a central passage 291 which extendsthrough that sleeve. A second and very much shorter recess Iii-l2 isprovided at the rear face of the sleeve 194, and that recess has alarger diameter than the recess Ztl-8. The central passage 291 and therecesses 213@ and 2552 are all concentric.

The numeral 234 denotes a cylindrical conductor which has a conicalleading edge which has a washer 295 pressed onto it adjacent thetraining edge thereof. The engagement between the washer and theconductor 20d is suiliciently intimate to lock that was; er in positionon that conductor. The diameter of the conductor 234 is large enough toprovide a press lit between that conductor and the central passage Zllthrough the sleeve 194. As a result, when the conductor 294 has beenpressed forwardly through the recesses 262 and 7x3@ and through thecentral passage ZM until the washer 2915 abuts the left-hand end of theecess 29d, that conductor will remain in assembled relation with thesleeve i915.

The numeral 238 denotes a helical compression spring which isdimensioncd to telescope over the trailing edge of the pin 234 and totelescope freely within the recess Edil. A conical mber of metal nas itsapex telcscoped partially within the right-hand end of the spring 26S,and it has a diameter that is larger than the outer diameter of thespring As a result, the conical member 215 centers i F relative to thehelical compression spring 263 and can be used to apply compressive l2forces to the hel`cal compression spring 20S. A flanged washer 2l?. isseated within tne recess Ztl-2, and the inner diameter of; that sleeveis smaller than the diameter of the conical member 216. Consequently,when that flanged washer is tixediy secured within the recess 262, as byconsenting or the like, that flanged washer will prevent accidentalseparation of the helical compression spring and the conical member 219from the sleeve The flange on the flanged washer 212 is annular inconfiguration; and it is smaller than, and projects through, the openingiM) in the rear wall of the coin receptacle box rl`he sleeve llis set inregister with the opening 191'), and a retaining collar 2id istelcscoped over that sleeve used to hold that sleeve in assembledrelation with the f -ar wall of the coin receptacle box 186. 'Ihatretaining collar has a number of openings 2l6 through it, and thoseopenings can be set in register with corresponding openings in the rearwall of the coin receptacle box 185. steners 25,3, such as rivets or thelike, .lass through the openings 2id and tnrough the correspondingopenings in the rear wail ci the coin receptacle box i555 to lixedlymaintain the collar 2514 a* d the sleeve l9-iin assembled relation withthe ar wall of the coin receptacle box 186. The numeral 22 denotes 4ahollow cylinder which has a closed l 'ng edge and which has an opentrailing edge and whicn has an outwardly directed ilange adjacent thatopen trailing c A helical compression spring Z22 is telescoped withinthe hollow cylinder 22d, and a conical member 224- nas its apexextending into the right-hend end of that helical compression spring.Openings are provided in the liangc of the `hollow cylinder 22d andcorresponding openings are provided in the rear wall of the coinreceptacle box 1515. Fasteners 226, such as rivets or the like, extendthrough the alined openings in the llange and in the rear wall of thecoin receptacle `box iS and prema f.. To

nently secure the cylinder 2242 `to that rear wall. The diameter of theopening juf/2 in the rear wail of the com receptacle box is smaller thanthe diameter of the conical `member 22d, and hence the conical member224 will be confined within the cylinder 223. That conical member willnormally be pressed against the inner face of the rear wall of the coinreceptacle box by the spring 222.

The conical Ileading edges of the pins l7l and 189 act to guide themovement of the coin lrc eptacle box 136 into position within thehousing, not shown, secured to the baclzbuse T169. The conical leadingedge of the pin 17'!) will pass through the flanged washer 212 and cngagthe conical member 2li) and cause that conical member to compress thehelical compression spring 23S. Simultaneously the conical leading edgeof the pin lll@ will pass through the opening EEES in the rcar wall ofthe coin receptacle box 186 and engage the conical member 224 and causeit to compress the helical compression spring 222. The helicalcompression ysprings Zilli and E22 will serve as conductors and `willelectrically connect the pin 17) with the conductor 264 while connectingthe pin ld with the cylinder 22C. As `a result, when coins pile upwithin the coin rec ptacle box idf to the point where coins liecontinuously in engagement with the cylinder 220 and other coins liecontinuously in engagement with the conductor 231i, those coins `willcomplete the circuit between the conductor 2.0i!- and the cylinder 22Sand thereby complete the circuit between the conductor 173 and thegrounded bacltbase i633. The principal advantage of the constructionshown in FIGS. ll-l6 over the construction shown in FIGS. '/ltl is thatthe openings 198 and 92 in the rear ".vall of the coin receptacle box136 are completely obstructed. Hence, no instrument or tool could bepassed through those openings and used to re-sct the locking attacl' ontfor the closure for opening `libia?. The sleeve ld and its embedded`fret-al plate E95 constitute a combined support and dellector thatperforms the functions ofthe combined support and deilector 36.

lf desired, the coin receptacle box 1t-S5 could itself he anlass@ usedas the grounding conductor for the coins. This could easily be done bymounting a leaf or helical compression spring on the backbase lati soits free end engaged the coin receptacle box; and that spring wouldserve to interconnect that baclibase and that coin receptacle box. Thesurface engaged by the free end of the coin receptacle box should befree of paint or other insulating material and part of the inner surfaceof that coin receptacle box also should be free of paint or otherinsulating material. In that way, -a low resistance connection could becompleted between lthe backbase lo@ and the coins within the coinreceptacle box 186.

The particular configurations of the combined support and deflectorshown in the drawing are desirable, but other configura-tions could beused. However, such other configurations also should dispose the exposedends of the conductors inwardly from the walls of the coin receptacleboxes and also should space those exposed ends away from the inletopenings of those boxes. ln that wai those other configurations alsowill be able to avoid premature indications of the need of replacing thecoin receptacle boxes.

Whereas the drawing and accompanying description have shown anddescribed several preferred embodiments of the present invention itshould be apparent to those skilled in the art that various changes-rnay lbe made in the form of the invention without affecting the scopethereof.

What I claim is:

1. in a coin operated telephone which has a terminal connectable to the`battery side of the telephone line, which has a `grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor the projects forwardly from a point adjacent thebackbase of said coin operated telephone, and extends through thecentral area of said coin receptacle box and extends towards the 4frontwall of said coin receptacle box, -a resistor that is connected betweensaid conductor and one of said terminals and a second conductor thatextends forwardly from a point adjacent said backbase of said coinoperated telephone and extends through said central area of said coinreceptacle box `and extends toward said front wall of said coinreceptacle box, and an electrical -connection between said baclcbase andthe other of said terminals, said conductors normally being electricallyisolated b-ut being adapted to be connected -together by piled up coinsin said coin receptacle box to connect the first said terminal to saidgrounded terminal through said piled up coins and said resistor, saidsecond conductor surrounding the first said conductor and serving tohelp support the first said conductor but permitting one end of thefirst said conductor to project beyond it, the first said conductorbeing insulated but having the insulation removed from said one endthereof, said second conductor bein-g below but adjacent the coinentrance of said coin receptacle box to intercept and deflect coinsentering said coin receptacle box through said coin entrance.

2. In a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removab-le coin receptacle box, the improvement whichcomprises a conductor that projects forwardly `from a point adjacent thebackbase of said coin operated telephone and extends through the centnalarea of said `coin .receptacle box and extends toward the front wall ofsaid coin receptacle box, a resistor that is connected between saidconductor and one of said terminals, and a second conductor that extendsforwardly from a point adjacent said bacltbase of said coin operatedtelephone and extends through said central area of said coin receptaclebox and extends toward said front wall of said coin receptacle box, andan electrical connection between said backbase and the other of saidterminals, said conductors normally being electrically isolated `butbeing :adapted to be connected together by piled up coins in said coinreceptacle box to connect the first `said terminal to said groundedterminal through said piled up `coins and said resistor, said secondconductor hav-ing a coin intercepting and defiecting surface and havinga tubular recess, nlid coin intercepting and deflecting surfacereceiving and deflccting coins that enter said coin receptacle box, thefirst said conductor being disposed within and having one end thereofprojecting beyond said tubular recess whereby the first and conductor isin part Vsupported by said second conductor, the first said conductorbeing insulated but said one end thereof being free of insulation, thefirst said conductor projecting through an 'opening in said rear wall ofsaid coin receptacle box that is smaller than a dime.

3. -ln a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, landwhich has a removable coin receptacle box, the improvement whichcomprises a conductor rthat projects forwardly from the backbase of saidcoin operated telephone, said conductor telescoping through the rearwall of said coin receptacle box, a resistor that is connected betweensaid conductor and one of said terminals, and a second conductor that ismounted on said backbase of said coin operated telephone, said secondconductor telescoping through said rear wall of said coin receptaclebox, and an electrical connection between said backbase and the other ofsaid terminals, said conductors normally being electrically isolated butbeing adapted to be connected together by piled up coins in said coinreceptacle box to connect the first said terminal to said groundedterminal through said piled up coins and said resistor, said secondconductor surrounding the first said conductor, said second conductorprotecting the insulation on the first said conductor from abrasion andwear.

4. yIn a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor 'that is mounted within and that is movable withsaid coin receptacle box and that is engageable by coins which enter andaccumulate within said coin receptacle box, said conductor beingphysically spaced from and being electrically isolated from the wallsand bottom of said coin receptacle box, a second conductor that also isengageable by coins which enter and accumulate within said coinreceptacle box, one of said conductors being connectable to one of saidterminals by a resistor and by a stationary conductive member wheneversaid coin receptacle box is assembled with said coin operated telephone,the other of said conductors being connectable to the other of saidterminals by a second stationary conductive member whenever said coinreceptacle box is assembled with said coin operated telephone, saidconductors normally being electrically isolated from each other butbeing adapted to be interconnected by entering and accumulating coins assaid entering and accumulating coins pile up in said coin receptaclebox, said conductors coacting with said entering and accumulating coinsto connect said terminals together through the medium of said resistor.

5. in a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable fcoin receptacle box, the improvement whichcomprises a conductor that projects forwardly from la point adjacent thebackbase of said coin operated telephone and extends through the centralarea of said coin receptacle box and extends toward the front wall ofsaid coin receptacle box, a resistor that is connected between saidconductor and one of said terminals, yand a second conductor thatextends forwardly from a point adjacent said backbase of said coinoperated telephone and extends through said central area of said coinreceptacle box and extends toward said front wall of said coinreceptacle box, and an electrical connection between said back-base andthe other of said terminals, said conductors normally being electricallyisolated but being adapted to be connected together by piled up coins insaid coin receptacle box to connect the first said terminal Ito saidgrounded terminal through said piled up coins and said resistor, thefirst said conductor being electrically insulated from said backbase.

6. In a coin operated telephone which has a terminal connectablc to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor that projects forwardly from a point adjacent thebaekbase of said coin operated telephone and extends through the centralarea of said coin receptacle box and extends toward the front wall ofsaid coin receptacle box, a resistor that is connected between saidconductor and one of said terminals, and a second conductor that extendsforwardly from a point adjacent said bacltbase of said coin operated`telephone and extends through said central area of said coin receptaclebox and extends toward said front wall of said coin receptacle box, andan electrical connection between said backbase and the other of saidterminals, said conductors normally being electrically isolated, meansincluding the relative positions of said conductors for connecting thefirst said terminal to said grounded terminal through said piled upcoins and said resistor.

7. ln :a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor that projects forwardly from a point adjacent thebackbase of said coin operated telephone 4and extends through thecentral area or said coin recep` tacle box and extends toward the frontwall of said coin receptacle box, a resistor that is connected betweensaid conductor and one of said terminals, a second conductor thatextends forwardly from a point adjacent said backbase of said coinoperated telephone and extends through said central area of said coinreceptacle box and extends toward said front wall of said coinreceptacle box, and an electrical connection between said backbase andthe other of said terminals, said conductors normally being electricallyisolated but being adapted to be connected together by piled up coins insaid coin receptacle box to connect .the first said terminal to saidgrounded terminal through said piled up coins and said resistor, and asleeve within said coin receptacle box that receives the first saidconductor, and an insulated lining for said sleeve.

8. In a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor that projects forwardly from the backbase of saidcoin operated telephone, said conductor telescoping through the rearwall of said coin receptacle box, a resistor that is connected betweensaid conductor and the first said terminal, a second conductor that ismounted on said backbase of said coin operated telephone, said secondconductor telescoping through said rear wall of said coin receptaclebox, an electrical connection between said backbase and said groundedterminal, and a locking attachment for the closure for the coin entranceof said coin receptacle box, said conductors normally being electricallyisolated but being adapted to be connected together by piled up coins insaid coin receptacle box to connect the first said terminal to saidgrounded terminal through said piled up coins and said resistor, thefirst said and said second conductors extending through and beingsupported by said lbackbase, and sleeves that are carried by anddisposed within said coin receptacle box, said sleeves minimizing thepossibility of inserting an instrument through the rear wall of saidcoin receptacle box to re-set said locking attachment for the closurefor the coin entrance of .said coin receptacle box.

9i In a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable receptacle box, the improvement which comprises aconductor that projects forwardly from a point adjacent the `bacltbaseof said coin operated telephone and extends through lthe central area ofsaid coin receptacle box and extends toward the front wall of said coinreceptacle box, a resistor that is connected between said conductor andone of said terminals, and a second conductor that extends forwardlyfrom a point adjacent said backbase of said coin operated :telephone andextends through said central area of said coin receptacle box andextends toward said front wall of said coin receptacle box, and anelectrical connection between said baclcbase and the other of saidterminals, said conductors normally being electrically isolated butbeing adapted to be connected together by piled up coins in said coinreceptacle box to connect the first said terminal to said groundedterminal through said piled up coins and said resistor, the first saidconductor having its free end spaced inwardly from the sides of saidcoin receptacle box and spaced away from the coin entrance of said coinreceptacle box.

l0. ln a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor L-that projects forwardly from a point adjacentthe backbase of said coin operated telephone and extends through thecentral area of said coin receptacle box and extends toward the frontwall of said coin receptacle box, a resistor Ithat is connected betweensaid conductor and one of said terminals, and a second conductor thatextends forwardly from a point adjacent said backbase of said coinoperated telephone and extends through said central area of said coinreceptacle box and extends toward said front wall of said coinreceptacle box, and an eletcrical connection between said backbase andthe other of said terminals, said conductors normally being electricallyisolated but being adapted to be connected together by piled up coins insaid coin receptacle box to connect the first said terminal to saidgrounded terminal through said piled up coins yand said resistor, one ofsaid conductors acting as a deector to intercept and deflect coinsintroduced into said coin receptacle box, the forward ends of saidconductors being spaced from the bottom and from all of the walls ofsaid coin receptacle box.

ll. ln a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor :that projects forwardly from the backbase of saidcoin operated telephone, said conductor telescoping through the rearwall of said coin receptacle box, a resistor that is connected betweensaid conductor and the first said terminal, and a second conductor thatis mounted on said back base of said coin operated telephone, saidsecond conductor telescoping through said rear wall of said coinreceptacle box, and an electrical connection between said -backbase andsaid grounded terminal, said conductors normally being electricallyisolated but being adapted to be connected together by piled up coins insaid coin receptacle box to connect the first said terminal to saidgrounded terminal through said piled up coins and said resistor, and athird conductor that is disposed within said coin receptacle box andthat is connected to the first said conductor whenever said coinreceptacle box is in position within said coin operated telephone.

12. ln a coin operated telephone which has a terminal connectable to thebattery side of the telephone line, which has a grounded terminal, andwhich has a removable coin receptacle box, the improvement whichcomprises a conductor that projects forwardly from the backbase of saidcoin operated telephone, said conductor teleseoping through the rearwall of said coin receptacle box,

a resistor that is connected between said conductor and the rst saidterminal, land a second conductor that is mounted on said baclebase ofsaid coin operated telephone, said second conductor telescoping throughsaid rear Wall of said coin receptacle box, and an electrical connectionbetween said backbase and said grounded terminal, said conductorsnormally being electrically isolated but being adapted to be connectedtogether by piled up coins in said coin receptacle box to connect thefirst said terminal to and grounded terminal through said piled up coinsand said resistor, and a third conductor that is is disposed within saidcoin receptacle box and that is connected to the first said conductor bya conducting spring whenever said coin receptacle box is in positionwithin said coin operated telephone, said third conductor and saidspring being supported by a member of insulating material that has ametal rebounding surface thereon in register with the coin entrance ofsaid coin receptacle box.

13. An indicating device that can be used with a coin operated telephoneto indicate when the accumulated coins in said coin operated telephoneshould be removed and that comprises a conductor that can be mounted soit can be engaged by the coins accumulated within said coin operatedtelephone, a resistor that can connect said conductor to one side of thetelephone line, and a second conductor that can be connected to theother side of said telephone line, said conductors normally beingelectrically isolated but being adapted to be connected together byaccumulated coins in said coin operated telephone to connect said oneside of said telephone line to said other side of said telephone linethrough said resistor and said accumulated coins.

14. An indicating device that can be used with a coin operated telephoneto indicate when the accumulated coins in said coin operated telephoneshould be removed and that comprises a conductor that can be mounted soit can be engaged by the coins accumulated wtihin said coin operatedtelephone, a resistor that can connect said conductor to one side of thetelephone line, and a second conductor that can be connected to theother side of said telephone line, said conductors normally beingelectrically isolated but being adapted to be connected together byaccumulated coins in said coin operated telephone to connect said oneside of said telephone line to said other side of said telephone linethrough said resistor and said accumulated coins, the first saidconductor being electrically insulated from the coin receptacle box ofsaid coin operated telephone and projecting through an opening in a wallof said coin receptacle box.

15. An indicating device that can be used with a coin operated telephoneto indicate when the accumulated coins in said coin operated telephoneshould be removed and that comprises a conductor that can be mounted soit can be engaged by the coins accumulated within said coin operatedtelephone, ya resis-tor that can connect said conductor to one side ofthe telephone line, and a second conductor that can be connected to theother side of said telephone line, said conductors normally beingelectrically isolated but being adapted to be connected together byaccumulated coins in said coin operated telephone to connect said oneside of said telephone line to said other side of said telephone linethrough said resistor and said accumulated coins, and a combined supportand deflector that is adjacent the first said conductor and thatintercepts and deects coins entering the coin receptacle box of saidcoin operated telephone.

16. An indicating device that can be used with a coin operated telephoneto indicate when the accumulated coins in said coin operated telephoneshould be removed and that comprises a conductor that can be mounted soit can be engaged by the coins accumulated within said coin operatedtelephone, -a resistor that can connect said conductor to one side ofthe telephone line, and a second conductor that can be connected to theother side of said telephone line, said conductors normally beingelectrically isolated but being adapted to be connected together byIaccumulated coins in said coin operated telephone to connect saidbattery side of said telephone line to said grounded side of saidtelephone line through said resistor and said accumulated coins, saidsecond conductor being supported by the coin receptacle box of said coinoperated telephone and projecting through an opening in a wall of saidcoin receptacle box.

17. In a coin operated telephone which has ia terminal connectable tothe battery side of the telephone line, which has a grounded terminal,and which has a removable coin receptacle box, the improvement whichcomprises a detlector that is mounted so it can be engaged by coinsentering said coin receptacle box, and that can deflect said coins awayfrom the coin entrance of said coin receptacle box, a conductor, aresistor that is connected between said conductor and one `of saidterminals, and a second conductor that is connected to the other of saidterminals, Isaid deector having a recess therein that accommodates thelirst said conductor, said conductors normally being electricallyisolated but being adapted to be connected together by piled up coins insaid coin receptacle box to connect the iirst said terminal to saidgrounded terminal through said piled up coins and said resistor.

18. In a coin operated telephone which has a terminal connectable to thebattery side of the telephone line and which has a grounded terminal,the improvement which comprises a conductor that `is mounted so it canbe engaged by the coins that accumulate within said coin operatedtelephone, a resistor that is connected between said conductor and oneof said terminals, `and a second conductor that is connected to theother of said terminals and that can be engaged by said accumulatedcoins, said conductors normally being electrically isolated but beingadapted to be connected together by said accumulated coins to connectthe iirst said terminal to said grounded terminal through saidaccumulated coins `and said resistor.

19. In a coin operated telephone which has a terminal connectable to thebattery side of the telephone line and which has a grounded terminal,the improvement which comprises a conductor that is iixedly andpermanently mounted within the coin receptacle box of said coin operatedtelephone so it can be engaged by the coins that accumulate within saidcoin lreceptacle box of said coin operated telephone, a second conductorthat is exposed to and that can be engaged by said accumulated coins,one of said conductors being connectable to one of said terminals by aresistor, the other of said conductors being connectable to the other ofsaid terminals, said conductors normally being electrically isolated butbeing adapted to be connected together by said accumulated coins toconnect the first said terminal to said grounded terminal through saidaccumulated coins and said resistor.

References Cited in the tile of this patent UNITED STATES PATENTS2,502,999 Shaun Apr. 4, 1950 2,642,881 Buchholz June 23, 1953 2,644,470Labbe July 7, 1953

1. IN A COIN OPERATED TELEPHONE WHICH HAS A TERMINAL CONNECTABLE TO THEBATTERY SIDE OF THE TELEPHONE LINE, WHICH HAS A GROUNDED TERMINAL, ANDWHICH HAS A REMOVABLE COIN RECEPTACLE BOX, THE IMPROVEMENT WHICHCOMPRISES A CONDUCTOR THE PROJECTS FORWARDLY FROM A POINT ADJACENT THEBACKBASE OF SAID COIN OPERATED TELEPHONE, AND EXTENDS THROUGH THECENTRAL AREA OF SAID COIN RECEPTACLE BOX AND EXTENDS TOWARDS THE FRONTWALL OF SAID COIN RECEPTACLE BOX, A RESISTOR THAT IS CONNECTED BETWEENSAID CONDUCTOR AND ONE OF SAID TERMINALS AND A SECOND CONDUCTOR THATEXTENDS FORWARDLY FROM A POINT ADJACENT SAID BACKBASE OF SAID COINOPERATED TELEPHONE AND EXTENDS THROUGH SAID CENTRAL AREA OF SAID COINRECEPTACLE BOX AND EXTENDS TOWARD SAID FRONT WALL OF SAID COINRECEPTACLE BOX, AND AN ELECTRICAL CONNECTION BETWEEN SAID BACKBASE ANDTHE OTHER OF SAID TERMINALS, SAID CONDUCTORS NORMALLY BEING ELECTRICALLYISOLATED BUT BEING ADAPTED TO BE CONNECTED TOGETHER BY PILED UP COINS INSAID COIN RECEPTACLE BOX TO CONNECT THE FIRST SAID TERMINAL TO SAIDGROUNDED TERMINAL THROUGH SAID PILED UP COINS AND SAID RESISTOR, SAIDSECOND CONDUCTOR SURROUNDING THE FIRST SAID CONDUCTOR AND SERVING TOHELP SUPPORT THE FIRST SAID CONDUCTOR BUT PERMITTING ONE END OF THEFIRST SAID CONDUCTOR TO PROJECT BEYOND IT, THE FIRST SAID CONDUCTORBEING INSULATED BUT HAVING THE INSULATION REMOVED FROM SAID ONE ENDTHEREOF, SAID SECOND CONDUCTOR BEING BELOW BUT ADJACENT THE COINENTRANCE OF SAID COIN RECEPTACLE BOX TO INTERCEPT AND DEFLECT COINSENTERING SAID COIN RECEPTACLE BOX THROUGH SAID COIN ENTRANCE.